Safety sheave block



5 vSheets-Sheet l nel. 12, 1929.

W. H. MCKISSICK SAFETY/ SHEAVE BLOCK original Filed May 1925 Feb. 12, 1929,

w. H. McKisslcK SAFETY SHEAVE BLOCK Original Filed May 3, 1926 3 Sheets-Sheet' 2 Feb. l2, 1929.

W. H. MKlSSlCK SAFETY sHEAvE BLOCK Original Filed May 5, 1926 3 Sheets-Sheet 7 .m 04., f ,f 4

W ZW /M m32 Y ...d w M i t f Originaly Reisgaeaj (Feb. *11a/ieee.

y WILLLAM rr;iiminssrcir, or" 'rural-a,rifxgrmrroiarn,1

i y l This-invcntioi'i ,relatesffto Lnew and useful 'improvements in' safety `sheave blocks. l

1' The invention pertains to the` same type i i i fofb'lock asis shown and described in my Pat- `4ent 1,633,489,7-dated'1l'une 21, 1927, ,andin lvolves certain*` specilic. improvements there` `ver.mf` f 1` .flo l n 'of said plates larranged tolbekbodily shlfted yto Aone side *togopengor displacether guard.

Theobject tlieinvention is totprovidey ablock having each'sideplate provided `withj o guard flanges for retaining the cable and one flanges ior the removal `or insertion 1 of a cable.

.videv a" movablev guard `plate `which maybe shifted laterallyl tol either side` together z with means forfretainng its flanges outof aline-q thefcable. e y .t 1 y y e kAnotherobject.of theinventionisto pro.-` Videla central dividing plate and spacer mem-f 'bers orqpositioning supporting bars' in ya .novel manner.

, s construction designedfto 'carry out the y lfinvention Will be hereinafter described with other featuresofthe invention. f

The'invention will be more/readilyunderstood', ironiai'eading of the following-K, specie and@ cation andbyreference to the accompany-` i ing` drawings, -Iin which an` example of the `invention is shown'and i wherein Figure I1. s a perspective vlew'of a block` constructed` lin `accordance f with my invention, t* Figure 21s a vertical cross-sectional View,

`l5`igure `3` isa central longitudinal sectional ,v1ew,p..-

theinvention,

' 'Figuref isya vertical/sectional viewtaken Figuref is a `horizontal .cross-sectionalk In the drawings the-numeral r10 designates y a central vertical partition plate yfrom which 50 y verticaliy side` bars 51'1 are spaced vby blocks or members {12"at1thelupper ends of the same.

Another object of: the inventionis to pro# f i Figure elevationot anotherfiiorrnofl 1' SAFETY sHEALvEBLocx. Q,

f `justable ltransverselyfivoii the block.' An axle mounted-in the partition and bars'extends through` lthe plates, the platelhaving an .il'eaasa'l, dated.".riuey a1, 1927, serial` mi.106,373,`r nica Maya, 192s, and monat Britain" June 25, 1927# Applicationk for reissueledlcto'ber 29,1928',` ySerial No. 315,899;

enlarged opening 16 ,toy permit -it `to 'shift'.v

relativelyf of. the,` nut T17 which holds the axle ,Y

in place.v

The plates extend transversely l beyond the `verticalsides of the partition and bars.` 1 `The plate 13 yhas inwardly directed f longitudinal flangesv 18 along ,each .vertical edge.y v.Fhefplate 14 has similar flanges 19 normally aligned with the flanges/18. Thek easv adjacent edges of the'ilanges may be spaced i slightly `apart asis shown in thedrawings.

` The upperv ends of thebars v11 ,extendbee Ntw'eenpfthe b1ocks'12. The upper'l'becket or;` bail 20' straddles the -partition platelO'and its eyes are disposed betweensaid plate and l.

the upper ends of the bars; AA becket bolt 21 t y passes through the parts7l0, 11 andl 13 and the eyes of the upper becket. :Thefxplate A14.

has a; horizontal slotl 23 through Which the 'boltpasses Avnut 22 screwed onto the bolt. overlies the` plate 14. The plateslB, and 14.l

each have a`hand-hold24- The lower becketl l v 25 vvis pivoted ona bolt26 passing through the same parts `as the bolt 21. The platelfihas a slot"28 receiving the bolt`26,` andfa ynut `screwed on the endof` the bolt 26.

For fastening'the guard plate y14 inI place,

particularly ifthebecket bolts are` removed, y

a pairof studbolts29 mounted on the adjacent sidebar, 11,engagewin slots() arranged adjacent the slots 23v and 28. Each of 'thek slots'123, 28and BOhas a notch 31ateach end for. receiving the bolts 21, 26 and 29, whereby f `the angesn19 are retained out of register lwith langes y18, when shifted either 'to ther y f right or left. Sheaves `J2 are mounted on th aXlel. on-feach side of the plate 10.

Itwillbe seenthat the plate l()` and the barsv 11 are suspendedy directly from the becket 20 and bolt-21and these parts carry the axle 15 mi"k and the lower becket `25 andy itsbolt 26. `The vertical edge portions of the pla-te extend f slightly beyond the blocks 12, thus dividing lthe cable channelsA formed oi'izeachsideof said t plate-and enclosed bythe guard plates and `the `flanges. f rThe blocks at'the upperfend sepj arategthe" lines of cable passing around thef` sheaves and `add to the, safetyy of.v the-housing.'y

los'

y When it is desired to open the block to in``. sert or. remove the cable, the stud ybolts 29 yare loosened asare thenuts 22 and 27 The ri 18 sufficiently to provide ample openings bey tween the edges of said flanges for the passage of the cable lines. 'Ihe notches 31 of the plate 14are thus seated on the bolts-to retain the cable gap between the flanges. The stud bolts and nuts 22 and 27 may then be tight-y ened when it is desired to lock the llanges out of register with each other, or 1n mis-matched `relation as dotted in Figure, in which position the block can be used.

In order to remove the cable from the sheaves, the lower becket 25 must be removed. After this operation the plate is shifted until the flanges are registered. The plate is then secured in position by fastening the bolts and nuts. The operation of the block is very simple and the long guard flanges 18 `and 19 protect the hands of thev workman and prevent injury'by contact with the lines of the cable. each end.

1t is desirable to remove the lower becket boltA under some conditions and the construc-A tion of thek block mayv be simplified as is shown in Figures 4 to 6,. In this form the central partition plate 10 has an upwardly extending lug 40 and the bars 11 areelongated to equal the length of the plate. Spacer. yokes 12v are secured to the shouldersof the platey10 and extend laterally ofthe ends of the bars 11 adjacent their upper ends. The upper becket bolt 21 passes through the upj per ends of the side bars andthe lug 40. and

the upper becket 20 is hinged thereon.

lin the guard plates.

The guard plate 14 in these figures has the slots 30 and stud bolts 29, as before described, but the'slots 23 and 28 are omitted. becket bolt 26 passes through apertures41 The bottom becket has enlarged ears 42 lengaging between the plates 13 and 14 on each side of the plate 10 and hinged on the bolt 26.y

The becket is of particular construction, one member 43 forming a hook having an ear 44 on the end of its bill. The other mem-r ber 45 forms a keeper and has spaced Vears 46 at its lower end receiving the ear 44 therebetween. A machine bolt 47 engaging in the ears fastens the parts together. It will be seen that by removing the bolt '47 'the keeper member 45 maybe swung to one side and a line easily looped over the hook member 43. When it is desired to shift the plate 14 the lower becket and its bolt 26 are removed and the stud bolts 29 are loosened.

lVarious changes in the'size and shape of the different parts, as well as modifications and alterations, may be made within the scope y'of the appended claims.

journaled on the support, a pair of guardv This is augmented by the blocks 12 atk The bottomV vin registration, means .whereby one of said plates is immovably attached to the support,

`and -meanswhereby the other plate is rendered laterally adjustable and non-rotatable.

2. In a safety block, a support, a becket from which the support is suspended, a sheave j'ournaledon the` support, a pair of guard plates attached to` the support and having upright guard flanges at each side normally in registration, means whereby one of said plates is immovably attached to the support, Y

means whereby the other plate is rendered laterally adjustable andv non-rotatable, and

spacer members mounted on the support between the plates and above'the sheave.

3.111 a safety block, a support, a becket from which the support is suspended, a sheave journaled on the support, a pair of guard 'plates attached to the support and having vupright guard flanges at each side normally in registration, one of said plates being provided with slots and fastening devices passing through the slots of said plate and engagingthe support, whereby said plate is adj ustably mounted, the other plate being immovably secured to the support.

4. In a safety block, a support, a becket from which the support is suspended, a sheave journaled on the support, a pair of guard plates attached tothe support and having upright guard flanges at each sidenormally in registration, one of said plates `being provided with slots, and spacer members mounted on' the 'support between the plates and above the sheave. y

5..In a safety block, a support, a becket suspending'v the support, Va pair of guard plates, each having inturned Aguard flanges, a sheave mountedon the support relatively between the flanges of eachv plate, means whereby one of saidplates is immovably attached to the support, means whereby the other plate is render non-rotatable and'adj'ustable laterally of the support, whereby its flanges are displaced laterally from the flanges of the other plate to open Vthe block, and means for securing the adjustable plate in its closed position. l

6. In a safety block, a, support, a Vbecket suspending the support, a pair of guard plates, eachv havinginturned guard flanges, a sheave mounted on the support relatively betweenthe flanges of each plate, means wherey by one of said plates is immovably attached to the support, means whereby the other plate is rendered non-rotatable and adjustable Vlaterally of the support, whereby its flanges are displaced laterally from the flanges of the other plate toopen the block and spacer members mounted on the support between the plates and above the sheave.

7. In a' safety block, a central partition plate, upper and lower beckets connected with said plate, upright sidebars spacedifrom said plate, an axle ,passing through saidplate,

sheaves journaled on] saidv` axle onl each sideof said plate, a pair :of flanged guard members venclosing said bars, plate and sheaves,and means whereby one of said members 1s: rendered adjustable laterally of the other -to open y lpassing throughthe slots of saidguardplate j.

the flanged portions'thereofg s 8. In al safety bloclqa lcentral partition othery guard platehaving slots, and stud bolts and engaging in theadjacent side bar. e e

f 9. Ina safety block, ,a centralpartition plate, upper and'lower'beckets connected with s said plate, upright side bars spaced from saidV plate, an faxlepassing through said plate, sheaves )j ournaled ony said axle on each'side of `said plate, a pair of guard plates having reg--k istering side: flanges, one of said guard platesj being fastened tok one ofthe side bars, the other' guardplate having slots, and spacer members carried'at the upper end of the central plate and,r spacing the side bars" there from. s p

V10. l Ina safetyv sheave block, opposite j side bars, a sheave' journaledtherein, side plates secured to-said bars and extending a substan-` tial. distance beyond. the periphery of the sheave, elongated guard flanges directed-fin-V wardly from, the-side edges of the opposite side platesl and vrextending `longitudinally `of the side 'bars above" and below the axis of the sheave' with-their free edges registered i with each 'otherpboth of said plates .being l nonrotatable" andmeans for securing edgesin registered relation.` f

1. .11. Inasafety sheaveblock,opposite side bars, a sheavejournaled therein, side plates.' `secured to said bars and extending a substantial distance beyondl the peripheryof the fsheave, elongated guard flanges directed in-. wardly from the sidefbarsfabove andbelowA the axis ofthe sheave witlitheir freee'dges v out of'register witheach other, andA means for securing such edges( in non-registering relation..`

"12. lna `safety sheave blockfa support, a .sheavejournaled onzvthe support, a pair of yguard platesattached to thesnpport and yhavingupriglfit guard flanges at each' side normally in registration, one yof said platesy being immovably attached; to rthe support,v f 'n p and means for securing thefotherplatewth s t `13.` In a safety sheave support including `a plurality of spacing e its ange out ofzregister with the iange of the immovable plate.`

hars,l a pair of non-rotatable side plates secured to the bars of the supporty and spaced block, `an elongated f l apart, a sheave.`journaled between the bars n ofther support, said sheave being'coveredonj each plane sidel'by saidplates which extend a substantial distancev beyond the periphery of they sheave, guards mounted betweenv the plates and overhanging the sheavenon each side of the support, vand 'elongated guardi yflangesdirectedA inwardly from the side edges "ofsa-id plates transversely of the face of the sheave, there being two guards on each-"plate runningflongit'udinally of the bars vof rthe supportyabove and below the journal ofthe 14. Ina safety sheave block,r a support,

sheavejourna-lled therein, side plates mounted upon said support and having opposite 4 the'sheave', and means for retainingjsaid yare formed between 'correlated flanges.

15. Ina safety sheave block,'a support,` a

sheave journalled therein, sidefplates mounted "upon said supportand vhaving opposite elongated `guard flangesrdirected inwardly from` the plates above andibelow the axis of the sheave, mea-ns `for securing one of said; plates in position, and means upon saidplate `,cooperating with the securing means to sef cure the flanges of vopposite plates in mis-y matched relat1on.7 v

elongated guard liangesrfdirected inwardlyy v y yfrom thev plates above and-below,v the axis of"L n 35" 1 flanges outy of register, whereb-yhlcable gaps 16. In. asafety sheave block,-asupport, a

`sheave` journalled therein, opposite -sidei plates" mounted .upon said support. and one y,thereof being-formed with an elongated slot Y having seats at itsopposite ends, inwardly extending, guard ianges at each `si'deof said plates, and securing means extending through if said lslot and said. seats.

constituting part of a housing, guard flanges at opposite sides `of the plates andcoacting therewith to'fo'rm a sheavehousing and soprea latedas tol provideupright cable gaps at ,each side ofthe sheave, andmeansfor fastening said plates upon the; support, the cable gaps ofthe` housing extending above and below the axisuof the :'sheave and beingcoextensive .L i'

with'the guardilanges.`

'v i 'WILLIAM MQKISSICK.

adapted to engage either ofk 105 17. In a'safety sheave block, a support-'a y ySheave journalled in said support', non-rotat-` yable side plates applied to said support and y 110 ln' testimony whereof I aflixmy signature. 

